Medical marijuana helps cancer patients in ways that pharmaceuticals cannot, it has many wonderful purposes. One of them is that it helps you regain your appetite, manage pain, and relieve nausea and vomiting. Also improves sleep in patients using chemotherapy. Marijuana slows and stops the spread of cancer cells throughout the body. It is also useful in patients suffering from post-traumatic stress disorder (PTSD), as it contributes to memory extinction. Memory extinction is the normal and healthy process of removing associations of harmful stimuli. By doing this, it helps control the brain of fear and anxiety about what may have affected it. Multiple sclerosis is another medical condition that marijuana has positive effects on. It is used to stop negative neurological muscle spasms caused by the disease. The THC in marijuana binds receptors in muscles and nerves to relieve pain. Arthritis is another common medical condition that can be easily controlled through the use of medical marijuana. Marijuana helps reduce pain, inflammation and also promotes sleep, which in turn can help relieve the discomfort associated with rheumatoid.